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Ubuntu Security Notice USN-4628-1

Ubuntu Security Notice USN-4628-1
Posted Nov 11, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4628-1 - Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running Average Power Limit feature of some Intel processors allowed a side- channel attack based on power consumption measurements. A local attacker could possibly use this to expose sensitive information. Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that some Intel Processors did not properly remove sensitive information before storage or transfer in some situations. A local attacker could possibly use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2020-8695, CVE-2020-8696, CVE-2020-8698
MD5 | d5b28c9aff5b23a7f8ad7249a7633849

Ubuntu Security Notice USN-4628-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4628-1
November 11, 2020

intel-microcode vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in Intel Microcode.

Software Description:
- intel-microcode: Processor microcode for Intel CPUs

Details:

Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine
Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running
Average Power Limit (RAPL) feature of some Intel processors allowed a side-
channel attack based on power consumption measurements. A local attacker
could possibly use this to expose sensitive information. (CVE-2020-8695)

Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that
some Intel(R) Processors did not properly remove sensitive information
before storage or transfer in some situations. A local attacker could
possibly use this to expose sensitive information. (CVE-2020-8696)

Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that
some Intel(R) Processors did not properly isolate shared resources in some
situations. A local attacker could possibly use this to expose sensitive
information. (CVE-2020-8698)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
intel-microcode 3.20201110.0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
intel-microcode 3.20201110.0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
intel-microcode 3.20201110.0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
intel-microcode 3.20201110.0ubuntu0.16.04.1

Ubuntu 14.04 ESM:
intel-microcode 3.20201110.0ubuntu0.14.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/4628-1
CVE-2020-8695, CVE-2020-8696, CVE-2020-8698

Package Information:
https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.20.10.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.18.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.16.04.1
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